Alright, let's work through 53373981 times 71080377 step by step
53373981 × 71080377 = 71080377 × (53373981)
+ 71080377 × 1 giving us 71080377
+ 71080377 × 80 which equals 5686430160
+ 71080377 × 900 what gives us 63972339300
+ 71080377 × 3000 yielding 213241131000
+ 71080377 × 70000 what gives us 4975626390000
+ 71080377 × 300000 what gives us 21324113100000
+ 71080377 × 3000000 yielding 213241131000000
+ 71080377 × 50000000 yielding 3554018850000000

= 3793842691470837
